Guilds of Ravnica

Charnel Troll | Creature | Troll | Trample At the beginning of your upkeep, exile a creature card from your graveyard. If you do, put a +1/+1 counter on Charnel Troll. Otherwise, sacrifice it. {B}{G}, Discard a creature card: Put a +1/+1 counter on Charnel Troll. | Daniel Ljunggren

Erstwhile Trooper | Creature | Zombie Soldier | Discard a creature card: Erstwhile Trooper gets +2/+2 and gains trample until end of turn. Activate only once each turn. | Jason A. Engle

Ochran Assassin | Creature | Elf Assassin | Deathtouch All creatures able to block Ochran Assassin do so. | Anna Steinbauer

Pitiless Gorgon | Creature | Gorgon | Deathtouch | Alex Konstad

Golgari Locket | Artifact | | {T}: Add {B} or {G}. {B/G}{B/G}{B/G}{B/G}, {T}, Sacrifice Golgari Locket: Draw two cards. | Milivoj Ćeran